Hystrichosphaeridium brevispinosum
"brevispinosum" Eisenack, 1931, p.111, pl.5, figs.3-5 ex Eisenack, 1938a, p.12. Holotype: Eisenack, 1931, pl.5, fig.3, lost according to Eisenack (1959, p.197). Neotype: Eisenack, 1959, pl.15, fig.13, designated by Eisenack (1959, p.197), lost according to Ribecai and Tongiorgi (1999, p.124). New Neotype: Eisenack, 1959, pl.15, fig.16, designated by Ribecai and Tongiorgi (1999, p.124). NOW Pachysphaeridium brevispinosum (Appendix A). Originally Ovum hispidum subsp. brevispinosum (name not validly published, Appendix A), subsequently Hystrichosphaeridium brevispinosum, thirdly Baltisphaeridium brevispinosum (Appendix A), fourthly Buedingiisphaeridium brevispinosum (combination not validly published; Appendix A), fifthly (and now) Pachysphaeridium brevispinosum (Appendix A). The name Ovum hispidum subsp. brevispinosum was not validly published in Eisenack (1931) since the specific name Ovum hispidum was not validly published. Age: Silurian.
Parent: Hystrichosphaeridium
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